function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Jang, Hyun-Do & Hyun, Chang-Woo & Ryu, Seah & Lee, Sang-Jun', 2],
    ['Lou, Yi-Lei & Ma, Dai-Kun & Jin, Ze-Tao & Wang, Hui', 1],
    ['Zhang, Si-Yu & Huang, Ying & Zhang, Pei & Zhu, Ke-Run', 1],
    ['Zhang, Si-Yu & Wang, Hao-Tian & Hu, Ying-Feng & Zhang, Wei', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=5)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 4, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);